Catheter



FIG. 1 is a perspective view of a catheter;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The portion shown by broken lines is for illustrative purposes only andforms no part of the claimed design. The dashed lines show a borderlinebetween the claimed design and other portion.

The ornamental design for a catheter, as shown and described.